John m



(No Model.)

J. M. FENDER. SPRING DEVICE FOR. GRAIN DBILLS.

Patented Feb. 28. 1893.

WITNESSES:

A TTOHNE).

Sterne i7 ATENT thrice.

JOHN M. FENDER, OF LIBERTY, INDIANA, ASSIGNOR TO THE COLUMBIA DRILLCOMPANY, OF SAME PLACE.

SPRING 'DEVICE FOR GRAIN-DRILLS.

SPECIFICATION forming part of Letters Patent No. 492,465, dated February28, 1893. Application filed November 16, 1892. $erial No. 452,232. (Nomodel.)

To aZZ whom it may concern.-

Be it known that I, JOHN M. FENDER, of Liberty, Union county, Indiana,have invented certain new and useful Improvements in Spring Devices, ofwhich the following is a specification.

This invention pertains to improvements in devices for connecting partsthrough the instrumentality of springs.

My improvements have been designed primarily for use in connection withseeding machines in which a rising and falling part is designed to exertelastic pressure upon dragbars, but the invention will be found ofutility in other situations.

My improvements will be readily understood from the followingdescription taken in connection with the accompanying drawings, inwhich:

Figure 1, is a perspective View of my improved spring device. Fig. 2, isa front elevation of the same: and Fig. 3, a side view of parts of aseeding machine exemplifying an application of my improved springdevice.

In the drawings:-A, indicates a cylindrical bar or tube: B, a yokeconsisting of a longitudinally slotted bar disposed at right angles tothe cylindrical bar, the cylindrical bar passing through the slot of theyoke so that the yoke may play endwise upon the bar and alsolengthwiseofthebar: O,projectionsoutwardly from the edges of the yoke,the two projections being disposed opposite each other: D, the slot inthe yoke: E, a coil of spring wire around the cylindrical bar at oneside of the yoke: F, a similar coil of wire upon the cylindrical bar atthe other side of the yoke, these two coils being formed of one piece ofWire as hereinafter explained: G, the wire joining the two innerterminals of the coils, this wire forming a loop projecting outwardlyfrom the coils and around one side of the yoke and resting over one ofthe projections O of the yoke: and H, a wire similarly connecting theouter portions of the coils, the loop formed by this wire projectingfrom the coils in the direction opposite the loop G, which it incloses,and resting on the opposite projection O of the yoke.

The two coils, as before mentioned, are, or may be, formed of one pieceof wire, the extremities of the piece being united, preferably, at thecross-portion of one of the loops. In Fig. 2 this juncture is shown asformed at one side extremity of the loop H. If cylindrical bar A bepressed downward in the slot, the yoke resisting the movement, thetendency will be to wind up the coils of the spring and the cylindricalbar will thus exert its pressure elastically downward upon the yoke. If,in the example shown, the cylindrical bar be lifted in the yoke it moveswithout moving the yoke until the upper extremity of the slot D isreached, after which the yoke is lifted by the bar. This form of springmay obviously be employed in transmitting motion elastically upward ordownward or in either direction according to how the projections Oengage the loops. It will be noticed that there is is no rigidconnection between either the yoke or the cylindrical bar and thespring, and therefore a series of the devices may be strung upon onecylindrical bar and have free sidewise motion and pivotal motion uponthe cylindrical bar.

Fig. 3 shows an exemplifying application in connection with a seedingmachine:--J, indicating the usual seeder frame: K, the usual drag-bars,arranged in a rank: L, the usual lever for giving pressure to thedragbars, the cylindricalbar A beingcarried by this lever and extendingacross over the drag-barsz and M, the pressure and suspension linksattached to the drag-bars and having at their upper ends the yokesengaging the cylindrical bar A.

The operation of the lever L will exert pressure simultaneously upon allthe dragbars of the rank through the medium of the spring-devices in anobvious manner. The drag-bars with their links M and connecting springdevices may adjust themselves freely along the length of the cylindricalbar as their movements may require.

I claim as my invention In a spring device, the combination,substantially as set forth, of a slotted yoke provided with oppositeprojections, a cylindrical bar engaging the slot of said yoke, and aspring formed of two coils disposed upon the cylindrical bar on oppositesides of the yoke and joined by loops projecting from the coils andengaging the projections of the yoke.

JOHN M. FENDER. Witnesses:

A. E. J oHNsoN, JOHN W. SHORT.

